Samuel aemsteong



(No Model.)

ARMSTRONG. Piston Rod Packing.

No. 230,986. Patented Aug. 10,1880.

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SAMUEL ARMSTRONG, OF NEWARK, NEW JERSEY.

PISTON-ROD PACKING.

SPECIFICATION forming part of Letters Patent No. 230,986, dated August10, 1880,

Application filed May 31, 1880.

To all whom it may concern:

Be it known that I, SAMUEL ARMSTRONG, of the city of Newark, in thecounty of Essex and State of New Jersey, have invented certain new anduseful Improvements in Piston- Rod Packing; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake andnse the same, reference being had to the accompanying drawings,and to letters of reference marked thereon, which form a part of thisspecification.

The object of this invention is to overcome the difficultiesexperienced, more or less, in the use of the various packings now in themarket by more perfectly preventing the cscapement of the steam,increasing the durability of the packing, and by rendering it bettercapable of being readjusted as the said packing wears away.

The invention consists in the combination, in a rhston-packing, of oneor more metallic rings divided or out into two or more parts, in amanner hereinafter shown, and inversely beveled, or, in other words,beveled inwardly toward the axis of said ring, and havinga groove forthe reception of rubber or other packing running around the peripherythereof, with one or more reciprocally-beveled rings also divided andhaving peripheral grooves for. the reception of packing.

It further consists in the combination of the above-named rings withrings of fibrous packing, and, further, in the combination of the samewith an improved automatic follower or gland, as will hereinafter bemore fully set forth and claimed.

Referring to the accompanying drawings, in which similar letters ofreference indicate like parts in each of the several figures, Figure 1is a view of my invention partially broken. away and in section, showingthe relation of the several parts to one another. Fig. 2 is aperspective view of an inversely-beveled plate; and Fig. 3, anotherplate beveled to engage therewith, both plates or rings showing themethod of dividing or separating them into parts to allow expansion.

In carrying out my invention, I construct the stuffing-box A, capable ofreceiving the (No model.)

bolts or shanks a, which pass through the flange b of the followerB.Through said boxA passes the piston-rod 0, around which passes a systemof metallic plates or rings, which, to a certain extent, embody myinvention. Said rings have their sides inwardly and outwardly beveled(or, as I shall henceforth designate them, inversely and reciprocallybeveled) in such a manner as to engage with and form steamtight jointswith one another, substantially as shown in section in Fig. 1 of thedrawings, 0 being the inversely-beveled ring, which is thinner towardthe axis, and d the reciprocallybeveled ring, thinnest at its periphery.The said rings 0 and d are separated into two or more parts by cutswhich run both obliquely across the face of the periphery and obliquelyor tangentially across the sides of the ring, as shown in Figs. 2 and 3.The said rings, when constructed and combined substantially asshownQleave grooves or spaceseand f between the rings and the piston-rodand the walls of the stuffing-box, wherebya more perfect adjustment ofthe packing is effected by reason of the lateral expansion andcontraction of the rings thus allowed and resulting from theirlongitudinal compression. The plates 0 and cl have encircling theirperipheries grooves for the reception of elastic packing, which packingacts not only to prevent the escapement of the steam, but also to holdthe rings together while not in their proper combination.

Between the system of rings 0 dand the head of the box, and between saidsystem and the follower B, I place fibrous or elastic packing a, whichacts as cushions for the rings to press against. The end rings of thesystem being generally the reciprocally-beveled rings d, the

tendency is to force the packing c outwardly against the box A, as willbe plainly understood by reference to the drawings. The rings are heldin position by the power brought to bear upon them by the follower B,which receives such power from the spiral springs g upon the shank a.Said springs have their bearings upon the flange 1) of the follower Band upon the washers h, which are held inposition by the nuts andlock-nuts m and m. By means of these springs thus applied the power ismore evenly brought to bear by the follower upon the packing than by theold method in use. By means of this follower the rings are kept in placeand automaticallyreadjusted as the plates or rings wear away.

In this invention I do not wish to be understood as claiming, broadly,the peculiar mannor of cutting or dividing the ring, the same beingshown and claimed in a previous patent granted to me, of which this isan improvement; but

What I claim, and wish to have secured to me by Letters Patent is- 1. Ina piston-rod packing, the combination of sectional rings 0 and (I,beveled or inclined substantially as shown, and peripherally grooved,for the purpose set forth.

2. The combination of the rings 0 and (Z, bev eled and grooved,substantially as shown, and elastic or fibrous packing 0, substantiallyas set forth.

3. The combination of the series of rings or plates 0, cl, and e,constructed substantially as described, gland B, shanks a, and springsg, substantially as and for the purpose set forth.

In testimony that I claim the foregoing I have hereunto set my hand this20th day of 25

